题目内容：

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的作文。文中共有10处语言错误，每句中最多有两处。每处错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

My secret of staying young is simple: Keeping your mind awake and you will stay young all over. Take an interest in the world around you, and learn at least a new thing every day. Don’t think that you are ever too older to go back to school. I know a man entered a medical college at 70. He got his degree with honors and became famous doctor. Other man, with his children encouragement, went to a law school when he was 71 and is now an active lawyer. You may never say that staying young is easy only for those living in the future. In fact, you could do it if you care enough to try to keep your mind awake and active, what is the only way to be always young.